devastating

/ˈdɛvəˌsteɪtɪŋ/
adjective
  1. Causing great damage or destruction.
    • A devastating wildfire destroyed thousands of acres of forest.
    • The hurricane left a devastating path of ruined homes.
    • The earthquake had a devastating effect on the city.
  2. Very shocking or upsetting.
    • It was devastating to learn that the old library would be closed.
    • The team's loss in the final was devastating for the fans.
    • She received the devastating news that her flight had been canceled.
  3. Extremely effective or impressive (often in a negative or overwhelming way).
    • She had a devastating smile that could charm anyone.
    • The boxer delivered a devastating punch to his opponent.
    • His devastating critique left the speaker speechless.